Bicycle frame



FIG. 1 is a top, front and right perspective view of a bicycle frame showing my new design;

FIG. 2 is a top, and front and left side perspective view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a front elevational thereof;

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is a top plan view thereof.

The wheels, tires, seat and headlights shown in broken lines in all drawings are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a bicycle frame, as shown and described. 